INDIAN DENTAL ACADEMY
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Bite Opening Bends
Begg Technique is universally acknowledged for its efficient
bite opening mechanics, which is indeed one of the strength of
This is the procedure where there is incorporation of
bends in the arch wire so that it helps in the intrusion of the
anterior teeth and extrusion of the molars. Many authors have
proposed different sites for the bite opening bends in the arch
First in the Conventional Begg’s , anchor bend is placed 3 mm
mesial to the molar tube in such a way that there is gingival
displacement of the anterior part of the arch wire therefore when
the arch wire is placed in the bracket, there is a intrusive force
acting on the anterior segment.
This is a modified bite opening bend given in the arch
wire distal to the canine. This tends to cause relative
extrusion of the canines and the intrusion of the central
In a modification given by Hocevar, bite opening bends are
placed on either side of canine, which results in more intrusion
of central incisors and relative extrusion of lateral incisors and
In a modification given by Mollenhauer, where a bite
opening curve is given, it will result in extrusion of the canine
and intrusion of central and lateral incisors
In this modification both the anchor bends and gable
bends are given, there is extrusion of the canine and
intrusion of the incisors
Swain advocates giving a mild gingival curve in the
anterior region which starts from mesial side of one canine
to the mesial side of the other canine for the better
intrusion of the anteriors.
Vertical step up bend
This intrusive action can be further augmented by
incorporating a vertical step up bend 3mm in height mesial to
the molar tube. After giving this bend, anchor bend of required
degree can be given in the upper end of the step up bend.
The power arms are made from .017×.025 or larger size wire.
The optimal length of the power arms is about 5−7mm and
follows the contour of the alveolus.
The power arms are soldered to the bands, just above the
Palatal elastics from TPA
This modification given by Prof. Dr. Jayade
TPA is fitted only after the molar relationship is corrected,
incisor proclination reduced and spacing closed.
The TPA carries a hook that is bent into the TPA itself or
soldered to it.the hook should lie in line with that of the lateral